Layer 2
Sidechains, validiums and rollups: what the labels actually mean
Networks marketed as layer 2s can have wildly different security. The distinction is not speed or fees — it is who can steal from you and whether you can leave without permission.
Data availability: the quiet constraint behind every rollup
A rollup is only trustworthy if anyone can obtain the data needed to check it. That requirement — not execution speed — is what has shaped Ethereum's scaling roadmap.
How bridges work, and why they keep getting hacked
Bridges hold enormous balances behind code that must be perfect and validators that must be honest. That combination has made them the single most exploited component in crypto.
Choosing the right withdrawal network (and the memo trap)
The same token exists on several chains, and sending it over the wrong one is one of the most common ways people lose funds moving money off an exchange. Here is how to get it right every time.
How Gas Fees Work on Ethereum
Gas fees are the cost of doing anything on Ethereum. Learn what drives them, why they spike, and practical ways to pay less without risking your funds.
Layer 1 vs Layer 2 Blockchains Explained
Layer 1 is the base blockchain; layer 2 is a network built on top to make it faster and cheaper. Here is how they differ and why both matter for scaling.
What are rollups and how do they scale Ethereum?
A deeper look at optimistic and zero-knowledge rollups — how they cut fees, inherit Ethereum's security, and differ from each other.